How much exercise for better brains?

How much exercise for better brains?

We all know tht exercise is good for the brain, but how much? It turns out that after a certain point, more exercise doesn’t necessarily result in better brain function. I wonder what the results would have been if the subjects had walked outdoors instead of on a treadmill? I’m guessing that the cognitive effects would have been greater.

In the meantime, though, the encouraging takeaway from the new study, he pointed out, is that briskly walking for 20 or 25 minutes several times a week — a dose of exercise achievable by almost all of us — may help to keep our brains sharp as the years pass.